INFLUENCE OF INTER-MOLECULAR INTERACTIONS ON THE KERR EFFECT IN GASES .2. EXPERIMENTAL RESULTS FOR SPHERICAL TOP MOLECULES

被引:49
作者
DUNMUR, DA
HUNT, DC
JESSUP, NE
机构
[1] Department of Chemistry, The University, Sheffield
[2] Dunstable College, The University, Dunstable, Beds
关键词
D O I
10.1080/00268977900103141
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The Kerr effect has been measured over ranges of temperature and pressure for gaseous argon, krypton, xenon, methane, tetrafluoromethane, 2,2-dimethylpropane and sulphur hexafluoride. Measurements have been analysed in terms of a virial expansion for the molar Kerr constant, and values are reported for the first and second Kerr virial coefficients (Ak and Bk)- Tentative results for the third Kerr virial coefficient (Ck) have also been obtained for methane, tetrafluoromethane, 2,2-dimethylpropane and sulphur hexafluoride.The temperature independent Ak is directly proportional to the second electric dipole hyperpolarizability, while Bk and Ck depend on the polariza-bility of interacting pairs and triplets of molecules. Our measurements of Bk are compared with those calculated from the DID model (see preceding paper [4]), and a correlation between the ratio BKexptABKDID and molecular interaction parameters is demonstrated. The results are also compared with measurements of depolarized light scattering in compressed gases. © 1979 Taylor & Francis Group, LLC.
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页码:713 / 724
页数:12
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